Lithium ion Battery are widely used in modern electronic devices and electric vehicles. To ensure the safe operation and extend the lifespan of battery packs, lithium ion battery protection boards play a crucial role. This article introduces the balancing principles of lithium ion battery protection boards and their applications in battery packs.
1. Principles of Battery Pack Balancing:
In a series-connected lithium ion battery pack, variations in the performance of individual batteries may exist. To ensure uniform charging, protection boards employ various balancing charging techniques. These include constant shunt resistor balancing charging, on-off shunt resistor balancing charging, and average battery voltage balancing charging. These methods adjust the distribution of current by introducing resistors, switch circuits, or voltage monitoring, ensuring that each battery in the pack reaches a similar charging state.
2. Principles of Battery State Protection:
Protection boards not only handle balancing charging but also monitor and protect each individual battery in the pack. Over voltage, under voltage, over current, short circuits, over temperature, and other states are monitored by the protection board. Once an anomaly is detected, the protection board rapidly takes action, such as cutting off charging or discharging currents, to safeguard the batteries from damage.
3. Application Prospects:
The application prospects of lithium ion battery protection boards are extensive. By adapting different protection board models and series numbers, these boards can accommodate power lithium ion battery packs with various structures and voltage levels. This provides a stable and reliable power source for electric vehicles, portable electronic devices, and more.
Summary
In summary, lithium ion battery protection boards, through balancing charging and multiple protective functions, ensure the safety and stability of battery packs, extending the lifespan of batteries. They provide robust support for the advancement of battery technology.
Kamada Power lithium ion battery series products all have built-in professional lithium battery protection board BMS, which can increase battery life by about 30% and make the battery more durable.
